Boundary Slave BMS Layout for Wireless Links Through Metal Housings
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wireless communication between a master battery management system and a slave battery management system can be unstable when a line of sight is not secured or when a metal material shields the communication path, leading to interference issues.
Innovation Solution
A battery system design where a first slave battery management system is installed at the boundary of a metal housing to avoid shielding, equipped with a first antenna for communicating with other slave systems inside the housing using frequency hopping and a second antenna for communicating with the master system outside the housing, allowing stable communication through channel selection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a slave battery management system is installed inside the metal housing for shielding protection, then protection from external interference is improved, but wireless communication stability deteriorates due to metal shielding
Solution Approach 1:
A first slave battery management system is installed at the boundary of the metal housing to act as an intermediary. It receives signals from the master battery management system outside the housing and transmits them to other slave battery management systems inside the housing, thereby mediating the communication between shielded and unshielded regions without compromising communication stability
Solution Approach 2:
The slave battery management systems are segmented into two functional groups: one located at the boundary (first slave BMS) and others inside the housing (other slave BMSs). This segmentation allows the system to handle communication differently for shielded and unshielded components, resolving the contradiction between shielding protection and communication stability
2Adaptability or versatility
If wireless communication is performed without securing line of sight between master and slave battery management systems, then installation flexibility is improved, but communication stability deteriorates
Solution Approach 1:
The first slave battery management system at the boundary serves as a relay station that receives signals from the master BMS and forwards them to other slave BMSs. This intermediary approach enables communication between systems that cannot directly see each other, maintaining stability without requiring line of sight
Solution Approach 2:
The communication path is extended from direct line-of-sight transmission to multi-hop transmission through the boundary slave BMS. By adding this intermediate transmission dimension, the system achieves communication stability without requiring direct visual contact between master and slave systems
Data Source
AI summary
A battery system includes a battery pack having a metal housing capable of accommodating a plurality of battery modules, a plurality of slave battery management systems configured to manage the plurality of battery modules, and a master battery management system installed outside the metal housing to wirelessly communicate with a first battery management system among the plurality of slave battery management systems, wherein the first slave battery management system which communicates with the master battery management system is installed at a boundary of the metal housing so as not to be shielded with the metal housing.